Computer Programming Contest Preparation

    1 3
    2 4
    3 2 1 1 3
    4 3 1 2 6
    5 2 6 10 3
    6 9 8 7 6
    7 3
    8 1 1 2
    9 1 1 1
   10 2 2 2
   11 3
   12 1 2 3
   13 2 3 1
   14 3 1 2
   15